Nut-lock.



W. FIFIELD.

NUT LOCK. APPLICATION FILED MAR. 23, 1909.

Patented Oct. 11, 1910.

8 R W i m M [all I V WITNESSES of which is provided a rib 5,.said ribexf 'Ada ted to take onto the threaded portion WARREN FIFIELD, 0F SAUKRAPIDS, MINNESOTA, ASSIGNOR OF ONE-THIRD WEBER, OF CASTLE ROCK,WASHINGTON.

TO A. J.

NUT-LOCK.

To all whom it may concern:

Be. it known that I, WARREN FIFIELmE a citizen of the United States,residing at Sauk Rapids, in the county of Benton and I State ofMinnesota, have invented certain new and useful Improvements in Nut-Locks; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to a new and useful improvement in nut locks and myobject is to provide means for securely locking a nut on a bolt.

A further object is to form the bolt so that the same may be manuallyreleased when it is desired to remove the nut.

A further object is to provide retaining means on the nut for thelocking in.

Other objects and advantages wil be hereinafter referred to and moreparticularly pointed out in the claims.

In the accompanying drawings forming part of this application, Figure 1is a side elevation of a bolt showing the nut thereon in lockedposition. Fig. 2 is an end elevation thereof. Fig. 3 is an end elevationof the same showing one arm of the locking pin bent in engagement withthe bolt.

Referring to the drawings in which similar-reference numerals designatecorresponding parts throughout the several views, 1 indicates a bolt,one end of which is provided with the usual form of threads 2, portionsof said threads on opposite sides of the bolt being removed to formflattened portions or seats 3.

of the olt 1 is a nut 4:, on the forward face tending across the frontface of the nut, between which and the seats 3 on the bolt, is adaptedto be introduced a locking pin 6. The locking pin 6 preferably consistsof a split key or cotter pin, the arms 7 and 8 of which are normallyspread apart by the spring tension of the connectin head 9, so that whenthe locking pin is introduced between the bolt and t e rib on the nut,

are

spring tension will be exerted on the arms Specification of LettersPatent. Patented 09$ 3 g; 5910.

Application filed March 23,

1909. Serial No. 485,256.

and hold the same in close relationship with the rib and bolt,respectively, the lower face of the rib being provided with a curvedchannel 10. which engages the curved face of the arms 7 and 8 and holdsthe pin against moving edge-wise from below the rib, while the pin isheld normally against longitudinal movement by inclining the channel 10,from that end of the rib which is engaged by the head 9 to the oppositeend of the channel.

After the locking pin has been properly seated,'the free end of the arm8 may be forced downwardly as best shown b dotted lines in Fig. 2,thereby securely loc ing the pin in position between the bolt and rib.

At such time as it is desired to remove the nut from the bolt, inre-adjust .the same the bent-down portion inay be straightened and, thepin driven lengthwise from between the rib and bolt, when the nut may bereadily turned to remove the same from the bolt or tightened as occasionmay require.

What I claim is:

1. A device of the character described,

comprising a bolt having a mutilated threaded portion, said portionhaving fiattened surfaces thereon removing complete segments from saidbolt, a nut applied to said bolt having a transverse rib projectin fromthe up er edge of one of its faces an a bifurcate spring in insertedbetween said projecting rib an one of said flattened surfaces, the underface of said projectin rib being concaved to form a channel an saidchannel inclined from one edge to the opposite side edge of said nut,whereby said bolt, the arms of said pin conforming 'in outline to thecurvature of said channel and said head engaging one end of said rib,said channel being inclined from that end of the rib engaged by saidhead to the 0pposite end of the channel, whereby longitndinal andlateral movement of said spring 'pin is prevented.

WARREN FIFIELD.

Witnesses THOMAS VAN ETTEN, HARRY GRIMNSER.

